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  3. Pet birds can not only imitate sounds, they can distinguish between languages, potentially offering new【C1】______on how the brai

Pet birds can not only imitate sounds, they can distinguish between languages, potentially offering new【C1】______on how the brai

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问题     Pet birds can not only imitate sounds, they can distinguish between languages, potentially offering new【C1】______on how the brain recognises speech, Japanese researchers say. It has already been【C2】______that monkeys, mice and other mammals can recognise different languages but this is the first time that birds have been found to【C3】______the ability, The Mainichi Daily News reported.
    A research team【C4】______Java Sparrows to English and Chinese translations recorded by exchange students of two well-known Japanese novels, The Tale of Genji and Natsume Soseki’s I Am a Cat. A bird sitting on a perch first listened to the English【C5】______and was only allowed to eat afterwards. Then the researchers played English and Chinese recordings at random and only allowed the bird to eat after hopping onto the perch with the English. The birds correctly identified the English recording 75 percent of the time. The same results were achieved with another two birds that were【C6】______to eat only when Chinese was played. "Humans are able to distinguish between languages, even ones they don’t know, from the intonation and pronunciation, and it seems that paddy birds have the【C7】______ability," said Keio University experimental psychology professor Shigeru Watanabe, who led the research.
    Watanabe said paddy birds like the Java Sparrow and parakeets, which are【C8】______vocally, learn sounds unique to their species after becoming adults, suggesting that they have a【C9】______ability to distinguish between sounds. The researchers did not use Japanese because it was the language the birds【C10】______listened to, the newspaper said.
A)possess I)confirmed
B)normally J)skilled
C)same K)version
D)suggestions L)low
E)clues M)rarely
F)high N)permitted
G)process O)different
H)exposed
【C4】
选项
答案H
解析 分析空所在的句子结构可知，本句缺少谓语动词，根据下一句的谓语listened可知，本空应填一过去式形式的动词，故H)和N)入选。由空后的to可知，本空所填词应能与 to搭配使用，故答案为H)exposed，expose…to…意为“使……接触……"。N)permitted也能与to搭配，但其表示“允许；批准”，to后接动词而非文中的名词，故排除。
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